Emerging market firms’ internationalization to advanced nations is topical for scholarly understanding. In this regard, IB research has paid scant attention on how emerging market firms’ domestic environmental engagement contribute to their internationalization to advanced economies. Against this backdrop, this study combines the institutional theory and ambidexterity perspective and utilizes the data of BRICS MNEs and finds the positive relationship between their domestic environmental engagement and internationalization to advanced economies. Furthermore, the transnational board pronounces, and domestic social engagement subsides this relationship, suggesting environmental engagement is sustainable and important role transnational board plays in BRICS MNEs environmental engagement and internationalization.